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 A041430 Numerators of continued fraction convergents to sqrt(231). 2
 15, 76, 2295, 11551, 348825, 1755676, 53019105, 266851201, 8058555135, 40559626876, 1224847361415, 6164796433951, 186168740379945, 937008498333676, 28296423690390225, 142419126950284801, 4300870232198934255 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 LINKS Vincenzo Librandi, Table of n, a(n) for n = 0..200 Index entries for linear recurrences with constant coefficients, signature (0,152,0,-1). FORMULA a(n) = 152*a(n-2)-a(n-4). G.f.: -(x^3 - 15*x^2 - 76*x - 15)/(x^4-152*x^2+1). [Colin Barker, Jul 15 2012] MATHEMATICA CoefficientList[Series[- (x^3 - 15 x^2 - 76 x - 15)/(x^4 - 152 x^2 + 1), {x, 0, 20}], x] (* Vincenzo Librandi, Oct 27 2013 *) CROSSREFS Cf. A041431. Sequence in context: A212241 A000477 A302376 * A156941 A205440 A051423 Adjacent sequences:  A041427 A041428 A041429 * A041431 A041432 A041433 KEYWORD nonn,cofr,frac,easy AUTHOR STATUS approved

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Last modified December 4 17:03 EST 2021. Contains 349526 sequences. (Running on oeis4.)